rbrb

A library for building RoBust RollBack-based networked games.

rbrb is heavily inspired by GGPO and GGRS, but aims to be more reliable and capable.

Assumptions

This library assumes your game is a deterministic Fn(&State, Set<Input>) -> State. We (will) have an additional testing mode that will spend extra cycles on checking that the state is consitent between players and deterministic on the same logical update.

Roadmap

Core Functionality

• [ ] Multi-party sync
• [ ] Consistent disconnection
• [ ] Reconnect disconnected player

Robustness

• [ ] Determinism checks
• [ ] Checksum propagation
• [ ] Debugging failed checks
• [ ] Fake a bad network
• [ ] Confirmation state

Features

• [ ] In-game replays
• [ ] Out of game replays
  • [ ] Headless
• [ ] Spectators
  • [ ] Drop in/out

Performance

• [ ] Input delta encoding
• [ ] Hub and spoke network

License: MIT